Of or referring to a river, including the organisms within a river or the landforms produced by river action. Fluvial processes include erosion, flow processes, and sediment and solute transport in rivers; see Pitty, ed. (1979) Geoabstracts 127–47 and Reid et al. in A. Brown and T. Quine, eds (1999). Fluvial erosion is the destruction of bedrock on the sides and bottom of the river; the erosion of channel banks; and the breaking down of rock fragments into smaller fragments; see Powell et al. (2001) Water Resources Res. 37 and Wijdenes et al. (2001) ESPL 26. Fluvial flux refers to the material carried by a river; see McCarney-Castle et al. (2012) Holocene 22, 91 on sediment transfers on the Danube. Fluvial deposition dumps material worked or deposited by rivers; ‘at current sea levels, the locus of fluvial deposition is not necessarily the ocean, estuary, or delta, but floodplains in and upstream of the fluvial-estuarine transition zone’ (Phillips and Slattery (2006) PPG 30, 4. Fluvial dunes are trains of highly ordered sediment waves along the sediment on a river bed. Coleman and Nikora (2011) ESPL 36, 1, 39 review current understanding of these bedforms.